C-23 hydroxylation shortcuts bypass campestanol, 6-deoxocathasterone,
and 6-deoxoteasterone and lead directly from (22S,24R)-22-hydroxy-5-
alpha-ergostan-3-one and 3-epi-6-deoxocathasterone to 3-dehydro-6-
deoxoteasterone and 6-deoxotyphasterol.